CN105179317B - The shell of sewage pump pads and has the sewage pump of shell liner - Google Patents
The shell of sewage pump pads and has the sewage pump of shell liner Download PDFInfo
- Publication number
- CN105179317B CN105179317B CN201510280677.XA CN201510280677A CN105179317B CN 105179317 B CN105179317 B CN 105179317B CN 201510280677 A CN201510280677 A CN 201510280677A CN 105179317 B CN105179317 B CN 105179317B
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- China
- Prior art keywords
- impeller
- shell
- slot
- liner
- sewage pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010865 sewage Substances 0.000 title claims abstract description 46
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000010813 municipal solid waste Substances 0.000 description 47
- 230000000694 effects Effects 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000002146 bilateral effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4286—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/22—Adaptations of pumping plants for lifting sewage
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/26—Installations for stirring-up sewage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention provides the shell liner of sewage pump and has the sewage pump of shell liner.The liner of shell used in sewage pump has surface that should be opposed with the edge of the blade of impeller when outer hub plate pad is assembled in sewage pump together with impeller.At least part on surface is formed at least one slot with defined width.Slot has first part, second component and Part III in the width direction, wherein first part is in the close side of the rotation center apart from impeller and has prescribed depth；Second part is in the remote side of the rotation center apart from impeller and more shallow than first part；Part III is the inclined surface that above-mentioned first part is connected with second part.
Description
Technical field
The present invention relates to sewage pumps, especially relate generally to the rubbish (foreign matter) containing the strips such as rope piece, strap and cellulosic
And sewage pump used in the extraction of the sewage of high amount of solid content and its used shell pad.
Background technique
The rubbish containing strip and cellulosic and high amount of solid content etc. are generally possible in sewage.Extracting this
Being lauched in pump etc. for kind sewage, is wrapped with the suction side of impeller there are rubbish or deposits between blade and the shell liner of impeller
The case where product rubbish.This rubbish is passed at any time gradually to be increased, the sewage for causing sewage to pump out impeller passage blockage
The example of flow reduction have a generation more.
The reason of as the above situation is generated, consideration is due to urbanization in recent years.That is, along with the hair of urbanization
Exhibition can not build lower Large Water Treatment Field in house, and in house build for sending water to the relaying of the Treatment stations in countryside
Pump field.But environmental pollution caused by the stench, waste handling in order to avoid the rubbish on house ground, hardly remove inflow
Diversified rubbish, and directly be lauched downwardly together Large Water Treatment Field conveying.Therefore, it is easy to produce in that above-mentioned sewage pump
Blockage problem.
In the past, it was extracting the sewage of the foreign matters such as the rubbish containing strip and cellulosic and high amount of rubbish or was containing
Have from the sewage pump of the draining of miscellaneous gurry of the discharges such as kitchen etc., using opening vane, semi-open type impeller to avoid this
A little foreign matters are accumulated in impeller, shell.Nevertheless, there is also foreign matters from being blocked in the gap that blade is padded with shell to take out
Water or situations such as cause the scaling loss of drive motor.
As the mechanism for solving the above problems, propose be provided in opposed with impeller shell liner it is radial
The scheme of slot is (referring to Fig. 2 and Fig. 3, the Japanese Unexamined Patent Publication 64-11390 bulletin of Japanese Unexamined Patent Publication 49-108103 bulletin
Fig. 2 and Fig. 3).According to the program, the slot and impeller that are padded by shell cut off the fiber sucked from the suction inlet of sewage pump
It is discharged after the field trash of matter towards outlet end.That is, foreign matter enters the radial slot of the inner wall of shell liner, in the state
Under, blade by with shell pad it is opposite in the form of play cutter effect, by cut off foreign matter prevent foreign matters from being blocked gap.Separately
Outside, it was also proposed that (special referring to Japan in the invention that the surface of the blade of impeller of pump opposed pump case forms the slot of change in depth
Open Fig. 4 of flat 11-201087 bulletin).
However, being had the following problems a little in each invention documented by above-mentioned each existing technical literature.That is, in strip and
In the case that the foreign matter of cellulosic, high amount of foreign matter enter the flow path of impeller, the foreign matters from being blocked of cutting, can not be by this in slot
A little foreign matters are smoothly discharged out from pump discharge.Especially in Japanese Unexamined Patent Publication 49-108103 bulletin and Japanese Unexamined Patent Publication
In the invention of 64-11390 bulletin, the section shape bilateral symmetry of slot, is not the shape for considering the flow direction of sewage.
In addition, be configured in the invention of patent document 3, although the depth of slot is not bilateral symmetry, since depth is from deep portion
Position continuously changes towards shallow position, so foreign matter is difficult to be detached from from the surface of slot.
Summary of the invention
The present invention is generated in view of the above subject.According to first embodiment, outer hub plate used in sewage pump is provided
Pad.Shell liner has should be opposed with the edge of the blade of impeller when outer hub plate pad is assembled in sewage pump together with impeller
Surface.At least part on the surface is formed at least one slot with defined width, and slot has in the width direction
First part, second part and Part III, wherein first part is in the close side of the rotation center apart from impeller and has
Prescribed depth, for second part in the remote side of the rotation center apart from impeller and more shallow than first part, Part III is will be above-mentioned
The inclined surface that first part is connected with second part.
In the sewage pump constituted as described above, there are the rubbish, a large amount of containing strip and cellulosic in sewage
The case where big rubbish.At this point, the case where there is also the suction sides that the rubbish of cellulosic is wrapped with impeller.It is wrapped with the suction side of blade
Rubbish the radial outside of impeller is rushed to because of centrifugal force.If rubbish reaches the outermost circumference of the suction side of blade, specifically
Because sewage stream rubbish is rushed to the gap that impeller and shell pad.The rubbish to get the gate in this way passes through the slot that is arranged in outer hub plate pad
It is cut off with the edge for padding opposed blade with shell.Even if in addition, cutting threadiness rubbish, a large amount of bulks rubbish
In the case where slot, pass through the stream changed due to the i.e. Part III in inclined surface that the first part of slot is connected with second part
Speed and the trend (acceleration) of rubbish, can also be such that rubbish is detached from from slot, thus (passing through the trend) make rubbish from slot successfully
Discharge.
According to second embodiment, on the basis of first embodiment, first part and second part and shell are padded
Inner wall it is parallel.
According to third embodiment, on the basis of first or second embodiment, the both ends of slot become relative to shell
The wall surface in the rectangular direction in the surface of liner.
According to the 4th embodiment, on the basis of the first any embodiment into third, slot with from impeller
The swirls at suction side corresponding position towards position corresponding with the outlet end of impeller are formed.
According to the 5th embodiment, on the basis of any embodiment in first to fourth, slot be towards and impeller
The swirls of peripheral part that are padded close to shell of the identical direction in direction of rotation.
According to sixth embodiment, on the basis of any embodiment in first to the 5th, slot is formed in outer hub plate
The range opposed with the edge of blade of pad.
According to the 7th embodiment, sewage pump is provided.The sewage pump has：Any embodiment in first to the 6th
Shell liner；Impeller, it is opposed with shell liner；Rotary shaft, the impeller are installed on the rotary shaft；And motor, make this
Rotary shaft rotation.
According to the 8th embodiment, on the basis of seven embodiments, the suction side of the blade of impeller is with from rotation
Central side extends towards radial outside to the direction opposite with the direction of rotation of impeller.
According to the 9th embodiment, on the basis of the 7th or eight embodiments, impeller is semi-open type.
Detailed description of the invention
Figure 1A~Fig. 1 C indicates that the shell liner of an embodiment of the invention, Figure 1A indicate that top view, Figure 1B indicate
Along the cross-sectional view of the line B-B of Figure 1A, Fig. 1 C indicates the enlarged drawing in the circle of dotted line of Figure 1B.
Fig. 2 is the partial sectional view for indicating to have the sewage pump of the liner of shell shown in Fig. 1.
Fig. 3 A, Fig. 3 B are the liners of shell shown in Figure 1A, and Fig. 3 A assumes that combination has the figure of impeller, and Fig. 3 B is outer hub plate
The side view of pad.
Fig. 4 is the figure that shell liner combination shown in Fig. 1 has impeller, and is facing upward from the direction of suction inlet
View.
Fig. 5 is the section view for indicating the shell liner (form for connecting each section of slot by curved surface) of second embodiment
Figure.
Fig. 6 is the top view for indicating the shell liner (forming the form there are two slot) of third embodiment.
Description of symbols：
1 ... impeller；2 ... pump cases；3 ... suction inlets；4 ... suction sides；5 ... outlet ends；6,6a, 6b ... shell pad；7…
Outlet；8 ... pump case feet；9 ... inner blades；10 ... grease chambers；11 ... pump case lids；12 ... spacers；13 ... axle envelope portions；14…
Rotary shaft；15 ... motors；16 ... hanging mechanisms；17 ... feed cables；18,18a, 18b ... slot；19,20 ... vertical planes；21,
21a ... first part；22,22a ... second part；23,23a ... Part III.
Specific embodiment
< entirety summary >
Next, being illustrated referring to attached drawing to an embodiment of the invention.Figure 1A~Fig. 1 C is to indicate this implementation
The figure of the shell liner 6 of mode, Fig. 2 are the figures for indicating to have the sewage pump of the vertical type of shell liner 6.As shown in Fig. 2, sewage
Pump has pumping section in lower part, and has motor 15 on top.Pumping section is provided with the impeller 1 of semi-open type, from motor 15
The lower end of the rotary shaft 14 of extension is equipped with the impeller 1 by bolt.Impeller 1 be configured at by pump case 2, shell liner 6 with
The space that pump case lid 11 impales.
It is formed with outlet 7 in pump case 2, and is also equipped with for pump case foot 8 needed for sewage pump is arranged.It is outer in pump
15 side of motor of cap 11 is configured with for sealing from the axle envelope mechanism 13 for rising the percolating water come with the gap of rotary shaft 14, and
And the grease chamber 10 of the lubricating oil for lubricating axle envelope mechanism 13 is provided with around it.Also, in pump case lid 11 and motor 15
Between be configured with spacer 12, the spacer 12 is from upper support axle envelope mechanism 13.On the other hand, axle envelope mechanism 13 is also from lower part
It is supported by pump case lid 11, to become the construction fixed by spacer 12 and 11 both sides of pump case lid.In addition, motor 15 exists
Top has feed cable 17 and hanging mechanism 16.
Impeller 1 has one or more blade, and have inboard for excluding to turn to mainboard high pressure water it
In blade 9 in mixed foreign matter, and in being played and rotating impeller 1 blade 9 function.In addition, the blade of impeller 1
The face of edge and shell liner 6 it is opposed, lower opening of the suction inlet 3 in outer hub plate pad 6.In addition, the impeller 1 of present embodiment
Blade be two.
< slot >
Next, being illustrated based on slot of Figure 1A~Fig. 1 C to swirls.Here, " swirls " refer in addition to packet
Containing the swirls other than two-dimensional swirls also comprising referred to as so-called spiral-shaped three-dimensional.Shell liner is being shown
In 6 Figure 1A~Fig. 1 C, as shown by the arrow, impeller 1 is rotated clockwise.Moreover, slot 18 is formed by swirls,
And it is located at 9 points of angle position for being equivalent to clock and watch close to the starting point of center side, the terminal of peripheral part, which is located at, is equivalent to clock
6 points of angle position of table.Therefore, slot is throughout about 270 ° of angular range direction direction identical with the direction of rotation of impeller
(clockwise) close to the shape of peripheral part.In addition, the angle position of above-mentioned starting point and terminal is easy for the position of explanation
It sets.In addition, the angular range of slot is also not limited to 270 degree, the angular range of 90 °, 360 ° can also be set in.In addition, outer
The part of the suction inlet 3 of hub plate pad 6 is three-dimensional swirls, in the slot 18 that the inner wall (upper surface) of outer hub plate pad 6 is formed
It is two-dimensional swirls.
Next, as shown in Figure 1B, being located at the height side of suction inlet 3 in the starting point for the slot 18 that the inside of suction inlet 3 is formed
To substantially middle part.As shown in Fig. 2, this is because the most peripheral portion of the suction side 4 of impeller 1 is located at the middle part of suction inlet 3.
That is, slot 18 is formed in the position opposed with the edge of the blade of impeller 1.In addition, from Figure 1A and Figure 1B it is found that the scroll of slot 18
Shape extends to 0 point of comparable angle position with clock and watch from 9 points of comparable angle positions with clock and watch, and towards 15 side of motor
Rise.Moreover, becoming swirls from 0 point of comparable angle position with clock and watch to 6 points of comparable angle positions with clock and watch.
The outermost circumference of the shell liner 6 of terminal as slot 18 is corresponding with the position of the outlet end of impeller.
Next, being illustrated based on section shape of Fig. 1 C to slot 18.Fig. 1 C is amplified in the circle of dotted line C by Figure 1B
Figure.The both ends of slot 18 become the vertical plane 19,20 substantially rectangular relative to the inner wall (upper surface) of shell liner 6.Separately
Outside, the bottom surface of slot 18 becomes the face parallel with the inner wall of shell liner 6.Wherein, in the left side of the width direction of slot 18 and the right side
Side depth is mutually different.Specifically, the depth that foreign matter enters side is deeper than the depth of foreign matter output side.
Here, side is entered to foreign matter and the definition of foreign matter output this sentence of side is illustrated.In fig. 1 c, slot 18
Left side be impeller the side rotation center L, the right side of slot 18 is the peripheral part side of impeller.The sewage pump of present embodiment is centrifugation
Formula, foreign matter moves to the right from left side.Therefore, it is defined as in fig. 1 c, the left side of slot 18 is that foreign matter enters side, the right side of slot
Side is foreign matter output side.For the slot 18 of present embodiment, the depth that foreign matter enters side is deep first part 21, foreign matter
Exporting side is the second part 22 more shallow than first part 21.Moreover, by having between first part 21 and second part 22
The inclined surface of predetermined angular that is, Part III 23 is connected.The angle of the Part III 23 is 30 degree~60 as an example
Degree.In order to which the foreign matter having been turned off is discharged from slot 18, which has the function of for generating trend.It is described after the point.
< acts on >
Next, being carried out based on Fig. 2 and Fig. 3 A, Fig. 3 B to the shell liner 6 of present embodiment and the effect of its slot 18
Explanation.If impeller 1 is rotated by the driving force of motor 15, sewage is sucked from suction inlet 3.Sometimes contain length in the sewage
The rubbish etc. of item and cellulosic.The rubbish of this cellulosic is entangled in the suction side 4 of impeller 1 sometimes.At this point, the leaf of present embodiment
Wheel is 1 as shown in Fig. 3 A, Fig. 3 B, and suction side 4 is along with from the side rotation center L towards peripheral part side, the rotation side of direction and impeller 1
Extend in the opposite direction.Therefore, even if temporarily the rubbish of cellulosic is wrapped with the suction side 4 of impeller 1, by centrifugal force with from dirt
The power that water flow is born, it is also mobile to the peripheral part side of suction side 4.
If the rubbish of cellulosic is more than the outermost circumference of suction side 4, edge and the shell of blade are entered by sewage stream
Between liner 6.Moreover, passing through hanging down for slot 18 if the rubbish of cellulosic is present in the edge of blade and the crossover location of slot 18
Face the effect of 19,20 with the edge of blade, the rubbish G of cut staple matter as shown in Fig. 3 A, Fig. 3 B directly.By the effect,
Rubbish is reliably prevented to be blocked between impeller 1 and shell liner 6.The effect that present embodiment plays is not only in that fiber
The rubbish of matter, and similarly rubbish can be decomposed finely by the effect of slot in the case where extremely large amount of rubbish, from
And it can be made successfully to flow together with sewage.
Other than above-mentioned effect, in the present embodiment, the unique section shape based on slot 18 is played more special
Effect.That is, as shown in Figure 1 C, the first part 21 and shallower second part 22 that slot 18 has depth deeper, above-mentioned first
It is connected between part 21 and second part 22 by inclined surface, that is, Part III 23.Since first part 21 is located adjacent to impeller
1 side rotation center L, so sewage is flowed from first part 21 towards second part 22.At this point, temporarily entering in rubbish
In the case where a part 21, rubbish is moved by sewage stream from left side to the right.At this point, along the inclined surface of Part III 23,
Rubbish is by the velocity component towards the inner wall surface side (top in figure) of shell liner 6.
On the other hand, it from Part III 23 to second part 22, is formed with from angle sharply of the inclination towards horizontal plane
Difference.Therefore, by the way that, towards the velocity component of the inner wall surface side of shell liner 6, rubbish is from second part 22 suffered by rubbish
Surface is detached from.Rubbish successfully excludes from slot 18 and swims side flowing downwardly together with sewage as a result,.It is illustrated again, due to
In the slot 18 of present embodiment, slot is formed by the combination of this three parts 21,23,22 of parallel surface → inclined surface → parallel surface, institute
To be reliably prevented from the inside that rubbish is accumulated in slot 18.In addition, because slot 18 is extended from the suction inlet 3 of shell liner 6
To the swirls of outlet end, so being capable of side along the slot 18 of the swirls by rubbish to be released to the outlet end of impeller
Formula discharge.
As previously discussed, the effect that can utilize slot 18, is discharged in time towards the outlet end of impeller 1 and is arranged at shell
Rubbish, a large amount of bulk rubbish for the threadiness that the slot 18 of liner and the edge of blade are cut off.In addition, Fig. 4 is from 3 side of suction inlet
Observe the figure of shell liner 6 and impeller 1.The suction side 4 of impeller 1 as shown in the figure from rotation center side towards peripheral part relative to
The direction of rotation of impeller 1 retreats angle [alpha].Therefore, even if the rubbish of cellulosic is temporarily wrapped with suction side, rubbish is also easy to sucking
The peripheral part side at end is mobile.
< second embodiment >
Fig. 5 shows the shell liner 6a of second embodiment of the present invention.The especially figure profile that is slot.Such as
Identical as Fig. 1 C shown in the figure, slot 18a has first part 21a → Part III 23a → second part 22a.Wherein, Fig. 1 C
Slot 18 each section with defined angle be connected, in contrast, in the embodiment of Fig. 5, with curved surface phase between each section
Even.In this way, it can prevent from for example stockpiling rubbish in the boundary part of first part 21a and Part III 23a.
< third embodiment >
In third embodiment shown in Fig. 6, implement in terms of slot 18b there are two being formed with shown in FIG. 1 first
Mode is different.Slot 18b is formed as two in this way, the edge of blade increases with the quantity of the position intersected slot 18b.Cause
This, the position increase of the rubbish of cut staple matter, extremely large amount of rubbish.
【Industrial utilizability】
The present invention can be used in the shell liner of centrifugal sewage pump.
Claims (9)
1. a kind of shell liner is the liner of shell used in sewage pump,
The shell is padded and is characterized in that,
The shell liner has should be with the edge pair of the blade of the impeller when being assembled in the sewage pump together with impeller
The surface set,
At least part on the surface is formed at least one slot with defined width,
The slot has first part, second part and Part III in the width direction, wherein the first part away from
The close side of rotation center from the impeller and there is prescribed depth, the second part is in the rotation apart from the impeller
The remote side in center and more shallow than the first part, the Part III is inclined what the first part was connected with second part
Inclined-plane,
The changes in pitch of the bottom surface of the slot described in the boundary two sides of the first part and the Part III, and described
The changes in pitch of the bottom surface of slot described in two parts and the boundary two sides of the Part III.
2. shell liner according to claim 1, which is characterized in that
The first part is parallel with the inner wall that the shell pads with second part.
3. shell liner according to claim 1 or 2, which is characterized in that
The both ends of the slot become the wall surface in the rectangular direction in surface padded relative to the shell.
4. shell according to claim 1 or 2 liner, which is characterized in that the slot is with from the suction side with the impeller
The swirls at corresponding position towards position corresponding with the outlet end of the impeller are formed.
5. shell liner according to claim 1 or 2, which is characterized in that the slot is towards the rotation with the impeller
The swirls for the peripheral part that the identical direction in direction is padded close to shell.
6. shell according to claim 1 or 2 liner, which is characterized in that the slot be formed in shell liner with
The impeller is assembled in the range opposed with the edge of the blade of the shell liner when sewage pump together.
7. a kind of sewage pump, which is characterized in that have：
Shell liner of any of claims 1 or 2；Impeller, it is opposed with shell liner；
Rotary shaft, the impeller are installed on the rotary shaft；And motor, rotate the rotary shaft.
8. sewage pump according to claim 7, which is characterized in that
The suction side of the blade of the impeller is with from the rotation center side towards radial outside and to the rotation with the impeller
The direction for turning contrary extends.
9. sewage pump according to claim 7, which is characterized in that the impeller is semi-open type.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014112800A JP6415116B2 (en) | 2014-05-30 | 2014-05-30 | Casing liner for sewage pump and sewage pump provided with the same |
| JP2014-112800 | 2014-05-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105179317A CN105179317A (en) | 2015-12-23 |
| CN105179317B true CN105179317B (en) | 2018-11-23 |
Family
ID=53269337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510280677.XA Active CN105179317B (en) | 2014-05-30 | 2015-05-28 | The shell of sewage pump pads and has the sewage pump of shell liner |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9835168B2 (en) |
| EP (1) | EP2949940B8 (en) |
| JP (1) | JP6415116B2 (en) |
| CN (1) | CN105179317B (en) |
| BR (1) | BR102015011595A8 (en) |
| TW (1) | TW201544714A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10837456B2 (en) * | 2015-03-27 | 2020-11-17 | Ebara Corporation | Volute pump |
| US11339804B2 (en) * | 2018-08-01 | 2022-05-24 | Liberty Pumps, Inc. | Self-cleaning pump |
| HUE062508T2 (en) * | 2019-08-15 | 2023-11-28 | Ksb Se & Co Kgaa | Scraper element for the leading edges of impellers of waste water pumps |
| KR102172067B1 (en) * | 2020-06-19 | 2020-10-30 | 엔에스하이드로(주) | A underwater screw pump for sewage |
| DE102020003854A1 (en) * | 2020-06-26 | 2021-12-30 | KSB SE & Co. KGaA | Centrifugal pump for pumping media containing solids |
| EP3988794A1 (en) * | 2020-10-26 | 2022-04-27 | Xylem Europe GmbH | Impeller seat with a guide pin for a pump |
| EP4208647A4 (en) * | 2020-10-29 | 2024-03-06 | Weir Minerals Australia Ltd | Grooved side liner for centrifugal pump |
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| DE102012023734A1 (en) | 2012-12-05 | 2014-06-05 | Wilo Se | Centrifugal pump especially for sewage or dirty water |
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- 2014-05-30 JP JP2014112800A patent/JP6415116B2/en active Active
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2015
- 2015-05-20 BR BR102015011595A patent/BR102015011595A8/en not_active Application Discontinuation
- 2015-05-21 TW TW104116216A patent/TW201544714A/en unknown
- 2015-05-28 CN CN201510280677.XA patent/CN105179317B/en active Active
- 2015-05-28 US US14/724,096 patent/US9835168B2/en active Active
- 2015-05-28 EP EP15169749.7A patent/EP2949940B8/en active Active
Patent Citations (5)
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| US1820150A (en) * | 1920-09-15 | 1931-08-25 | Moody Lewis Ferry | Labyrinth packing for turbines |
| US6190121B1 (en) * | 1999-02-12 | 2001-02-20 | Hayward Gordon Limited | Centrifugal pump with solids cutting action |
| CN101061319A (en) * | 2004-11-19 | 2007-10-24 | Itt制造企业公司 | Impeller wheel |
| CN101208520A (en) * | 2005-07-01 | 2008-06-25 | Itt制造企业公司 | Pump |
| CN103154522A (en) * | 2010-07-21 | 2013-06-12 | Itt制造企业有限责任公司 | Wear reduction device for rotary solids handling equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6415116B2 (en) | 2018-10-31 |
| US9835168B2 (en) | 2017-12-05 |
| BR102015011595A2 (en) | 2016-03-08 |
| US20150345505A1 (en) | 2015-12-03 |
| EP2949940A1 (en) | 2015-12-02 |
| TW201544714A (en) | 2015-12-01 |
| BR102015011595A8 (en) | 2016-03-29 |
| EP2949940B8 (en) | 2019-09-11 |
| EP2949940B1 (en) | 2019-07-10 |
| CN105179317A (en) | 2015-12-23 |
| JP2015227624A (en) | 2015-12-17 |
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